The front brake discs consist of an inner carrier, which is mounted to the wheel, and an outer rotor. Both parts must be changed together as a pair.
Remove the front wheel (sect. 7 - 1, Removal of the front wheel).
Undo the retaining screws (5) of the disc to the wheel, remove the disc (7) and, on its left side, slide out the phonic wheel (6).

Removal of the front brake system
Overhauling the front brake componentsRemoval of the starter motor idler gear
Slide the gear pin (21) complete with the gear (19) and washer (20).
Warning
Pay attention to the washer (20) since it may fall inside the
crankcase half.
At this point, it is possible to remove the starter motor as described in
sect. 6 - 3, Starter motor. ...
Removal of the tool tray
To remove the tool tray unit from the lateral footrests, loosen the screws
(40) and remove the splashguard (20).
Undo the screws (15) and remove the cover (16).
Move the wiring branch from the seat (s) on the tool tray.
Loosen the screws (24) to remove the tool tray unit (23) from ...
Tips for use on the road
Activate the dtc, select level 8 and ride the motorcycle in
your usual style; if the level of dtc intervention seems
excessive, try reducing the setting to levels 7, 6, etc., Until
you find the level that suits you best.
If changes in the grip conditions and/or circuit characteristics
and/or ...